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Visual function affects working ability in occupational health. We investigated the frequencies and grades of low vision in working age people who have glaucoma, and studied patients who were receiving low vision care, for example eye movement training. Among 3,905 patients aged 15 to 64 years old who visited Murakami eye clinic from October 2013 to September 2014, there were 363 patients suspected of having glaucoma and 138 patients diagnosed with glaucoma and receiving treatment. We measured their visual acuity and visual field to calculate their functional vision score (FVS). We studied the amount of reduction in visual ability and the number of patients undergoing low vision care by age groups. The vision test and visual field test showed that 18 patients had reduced visual ability, according to the FVS. Their FVS classification was from class 1 (mild vision loss) to class 3a (severe vision loss). The FVS matches the statistics of the WHO and can predict the reading and walking ability in each class. Reduced visual ability was recognized in about 14% of the glaucoma patients older than 45 years of age. 78% of the patients were classified in class 1. In FVS, class 2 (moderate vision loss) or greater is defined as low vision, and class 1 is a condition with no visual reserve. Although such patients have no problems in daily life and office work, they are challenged by on-site work and the on-site environment, and occupational health staff intervention becomes necessary.

An Evaluation of Visual Function in Working Age Patients with Glaucoma